Method of continuous capture verification in cardiac resynchronization devices
US8417337B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 13, 2009 |
| Grant date | Apr 9, 2013 |
| Priority date | — |
| Expiry date | Jul 1, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/36842
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
In bi-ventricular pacing devices (including CRT devices) analysis of myocardial electrogram signals in one ventricle (e.g., a left ventricle, or “LV”) can be used to infer capture or loss-of-capture (LOC) of an earlier stimulus pulse in the same ventricle, on a continuous (every pacing cycle), triggered, aperiodic and/or periodic basis. Rather than using an evoked-response principle as has been the basis of capture detection in prior art and other systems, a principle employed via the present invention uses evidence of inter-ventricular conduction (i.e., from the opposite chamber) and/or atrio-ventricular conduction as evidence of LOC, since a non-capturing pacing stimulus provided to a first chamber will allow the myocardial tissue of the first chamber to remain non-refractory and thus inter-ventricular and atrio-ventricular wavefront propagation and conduction can commence and be detected thereby revealing whether LOC has occurred.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.